{"id":"CVE-2019-6473","aliases":["ALPINE-CVE-2019-6473","DEBIAN-CVE-2019-6473","EUVD-2019-16033","GHSA-5gvx-v2fm-q3fv","UBUNTU-CVE-2019-6473","USN-7759-1"],"status":"published","title":"A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate","description":"An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01159,"percentile":0.67325,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-617"],"published":"2019-08-28T00:00:00Z","modified":"2026-11-03T06:32:17Z","fixes":[{"ecosystem":"Alpine:v3.11","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"kea","fixed_in":["1.7.2-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"isc-kea","fixed_in":["1.7.5-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"isc-kea","fixed_in":["1.7.5-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"isc-kea","fixed_in":["1.7.5-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"isc-kea","fixed_in":["1.0.0-1ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"isc-kea","fixed_in":["1.1.0-1ubuntu0.1~esm1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.11","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.12","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.13","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.14","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.15","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.7.2-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"isc-kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.5-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"isc-kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.5-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"isc-kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.5-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"isc-kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0-1ubuntu0.1~esm1"}]}],"versions":["1.0.0-1","1.0.0-1build1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"isc-kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.0-1ubuntu0.1~esm1"}]}],"versions":["1.1.0-1","1.1.0-1build1","1.1.0-1build2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"isc-kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0-1ubuntu0.1~esm1"}]}],"versions":["1.0.0-1","1.0.0-1build1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"isc-kea","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.0-1ubuntu0.1~esm1"}]}],"versions":["1.1.0-1","1.1.0-1build1","1.1.0-1build2"]}],"products":[{"vendor":"ics","product":"kea"},{"vendor":"isc","product":"kea"}],"references":[{"url":"https://kb.isc.org/docs/cve-2019-6473","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-6473"},{"url":"https://github.com/advisories/GHSA-5gvx-v2fm-q3fv"},{"url":"https://security.alpinelinux.org/vuln/CVE-2019-6473","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2019-6473","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-6473","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-6473","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-7759-1","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2019-6473","title":"A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate","description":"An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.","status":"published","published":"2019-10-16T17:22:16.73Z","modified":"2024-09-16T22:30:41.265Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:20:23.381621Z"}],"euvd":[{"id":"EUVD-2019-16033","description":"An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.","status":"published","published":"2019-10-16T17:22:16Z","modified":"2024-09-16T22:30:41Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T00:55:02.424132Z"}],"ghsa":[{"id":"GHSA-5gvx-v2fm-q3fv","title":"An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea...","description":"An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.","status":"published","published":"2022-05-24T16:59:13Z","modified":"2024-04-04T02:30:26Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-617"],"updated_at":"2026-11-02T14:56:08.751002Z"}],"nvd":[{"id":"CVE-2019-6473","description":"An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.","status":"published","published":"2019-10-16T18:15:37.123Z","modified":"2026-06-17T02:39:06.473Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":3.3,"vector":"AV:A/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-617"],"updated_at":"2026-11-02T14:05:31.860711Z"}],"osv":[{"id":"ALPINE-CVE-2019-6473","description":"An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.","status":"published","published":"2019-10-16T18:15:37.123Z","modified":"2026-11-03T06:32:17.848669761Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T07:17:57.723967Z"},{"id":"CVE-2019-6473","description":"An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.","status":"published","published":"2019-10-16T18:15:37.123Z","modified":"2026-03-14T09:38:52.527305Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:12.675558Z"},{"id":"DEBIAN-CVE-2019-6473","description":"An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.","status":"published","published":"2019-10-16T18:15:37.123Z","modified":"2026-09-21T07:03:22.88409065Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:32.57265Z"},{"id":"UBUNTU-CVE-2019-6473","description":"An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.","status":"published","published":"2019-08-28T00:00:00Z","modified":"2026-04-22T12:21:01.420989Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:21.741399Z"},{"id":"USN-7759-1","title":"isc-kea vulnerabilities","description":"It was discovered that Kea DHCP did not correctly handle invalid hostnames.\nA remote attacker could possibly use this issue to cause a denial of\nservice.","status":"published","published":"2025-09-21T23:51:11Z","modified":"2026-06-25T13:32:31.109521115Z","updated_at":"2026-11-02T16:58:21.91885Z"}]}}